If I put my Tesco mobile sim card into a UNLOCKED iPhone 4 will it work?

Will it work? Many thanks for answering, as I really want to know.

It probably should be able to do telephony. Internet functions would require programming the right settings into the phone.

It will but only if the sim fits into the iphone
If it doesn't eg too big you can actually cut it with scissors And it'll still work

As long as it's a mini SIM, yes it will.

It should. Hence why people unlock.

Of course.

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